Energy Stores, Transfers and Systems

• What are the eight types of energy stores?

  Kinetic, gravitational potential, elastic potential, chemical, electrostatic, nuclear, magnetic, thermal
• What are the three types of energy transfer?

  Mechanical, electrical, radiation
• What are the energy transfers in five different systems?

  1. Falling ball
  2. Gravitational potential energy store of ball
  3. Car hitting tree
  4. Kinetic energy store of car
  5. Thermal energy store of kettle's heating element
• What does work done equal in terms of energy?

  Work done = energy transferred
• What happens when a gravitational force does work on a falling ball?

  Gravitational potential energy transforms to kinetic energy
• What is the kinetic energy store of a falling ball?


  The energy associated with its motion
• What role do brakes play in a car hitting a tree?

  Brakes apply a normal contact force doing work
• What is the thermal energy store of a kettle's heating element?

  Energy transferred by heating water
• What is the definition of energy in the context of systems?

  Energy is a single object or a group of objects
• How does energy conservation apply to a falling ball?

  Energy is conserved as it transforms between stores
• What happens to the energy stores of a car when it hits a tree?

  Kinetic energy store transforms to thermal energy
• What type of energy store is associated with a compressed spring?

  Elastic potential energy
• What is the effect of mechanical energy transfer?

  It involves a force doing work
• What is an example of radiation energy transfer?

  Light or sound
• How does electrical energy transfer occur?

  By work done by moving charges
• What is the relationship between energy stores and energy transfers?

  Energy transfers change the form of energy stores
• What is the role of thermal energy in energy transfers?

  It is transferred by heating
• What happens to the energy of a ball when it falls?

  It converts from gravitational potential to kinetic
• What type of energy store is associated with a battery?

  Chemical energy
• What is the significance of energy conservation in systems?

  Energy cannot be created or destroyed
• How do different energy stores interact in a system?

  They transform into each other during energy transfers
• What is the effect of a normal contact force in a car accident?

  It does work on the car
• How does thermal energy affect the surroundings in a kettle?

  It is transferred to heat the water
• What happens to energy during a collision between a car and a tree?

  Energy is transformed into thermal and sound energy
• What type of energy store is associated with a magnet?

  Magnetic energy
• What is the role of gravitational potential energy in a falling object?

  It is converted to kinetic energy as it falls
• How do energy transfers affect the efficiency of a system?

  They can lead to energy losses, reducing efficiency
• What is the primary source of thermal energy in a kettle?

  The heating element
• How does energy conservation apply to a closed system?

  Energy remains constant within the system
• What is the significance of understanding energy stores and transfers in physics?

  It helps predict how energy behaves in systems